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Alphabetical list - U

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    File extensions starting with U

    U Subsampled Raw YUV Bitmap Image
    U00 The Price Is Right 2010 Game
    U01 Barudan Embroidery
    U08 UFile Data
    U10 UFile 2010 Tax Return Format
    U11 UFile 2011 Tax Return Format
    U12 UFile 2012 Tax Return Format
    U255LAW Exponential 8-bit Sound
    U2CAR NFS:U2 Car
    U32 Authorware Cover
    U3D Universal 3D Format
    U3I U3 Application Information Format
    U3P U3 Platform Install Format
    U8 Lemings 3D Audio Format
    U96 EasyZip Temporary
    UAE WinUAE Configuration
    UAL Entrust Unattended Login Credentials
    UAP SIMATIC WinCC User Archive Export
    UAQ Microsoft Windows Action Queue
    UAS Ulead PhotoImpact Backup
    UAV OpenPilot UAV Settings
    UAX Unreal Audio Format
    UB Unsigned Byte Audio Format
    UBIFS Linux UBIFS Image
    UBJ Universal Binary JSON Fiile
    UBM IPhoto Mtwain Install
    UBOX Universe Sandbox Saved Data Format
    UBR IIS WCAT Configuration
    UC UnrealScript Class
    UC2 UltraCompressor II Compressed Archive Format
    UCCAPILOG Microsoft Windows Live Messenger UCC API Log Format
    UCD Prosa Diagram
    UCE Microsoft Windows XP System32 Format
    UCF WebEx Universal Communications Format
    UCI UFS Explorer Backup Format
    UCL Unreal Tournament Cache Format
    UCLS ObjectAid UML Explorer Class Diagram
    UCM Urban Chaos Game Format
    UCP SmartWare Communications Profile
    UCR MicroSim PCBoard Unrouted Nets Report
    UCS Homeworld Localized Unicode Strings
    UCSETTINGS Universal Converter Settings
    UCT UC Browser Theme Format
    UCV Universal Converter Conversion
    UCX Rational XDE
    UD OmniPage User Dictionary
    UDA ZEMAX Model Data
    UDB Dynamics AX User Database Format
    UDC Adobe User Dictionary Format
    UDCX Microsoft Office Universal Data Connection Format
    UDEB Debian Package Format
    UDF Universal Disk Format
    UDG UDraw(Graph)
    UDI CorelDRAW Draw Script Textures Bitmap
    UDID Google Android Unique Device IDentifier
    UDIF Apple Mac OS X Universal Disk Image Format
    UDK Unreal Map Format
    UDL Microsoft Data Link Format
    UDM MapView User Module
    UDO Moray UDO 3D
    UDP Corel VideoStudio Scene Information
    UDS FIMware Database Format
    UDW Raw Unsigned DoubleWord (32-bit) Data
    UDX PI Expert Design Software
    UEA Protector Suite QL Format
    UEED Uconomix Encryption Engine Encrypted Directory
    UENC UltraEdit Encrypted Text
    UES Ulead Photo Explorer Slide Show
    UEW UltraEdit Wordfile
    UEZ Ulead COOL 3D Graphics
    UFA GIF Animator Animation Object Information
    UFC SATURN Suite
    UFDR UFED Physical Analyzer Report Package
    UFF DataWave SciWorks Physiological Data
    UFI UFOCaptureV2
    UFO Ulead PhotoImpact Object Format
    UFP Ulead Photo Project
    UFR Ultra Fractal Format
    UFS FreeBSD PC-BSD Unix File System Format
    UFS.UZIP FreeBSD Compressed Unix File System Format
    UFX Ultimate 3D Game Engine Material
    UGD Need For Speed Underground
    UGR Apophysis Gradient
    UHA UHARC Compressed Archive
    UHH Eurotherm Hydra History Encrypted
    UHS Universal Hint System Binary
    UHTM Unreal Tournament
    UHTML UHTML Document Format
    UI User Interface Format
    UIBAK UltraISO Backup Disk Image
    UIC COCO Unit ICon
    UID IBM Voice Type Users
    UID-ZPS Zoner Photo Studio Picture Autobackup
    UIF MagicISO Universal Image Format
    UIL IBM AIX User Interface Language
    UIN ICQ 2001 Saved ICQ Contact Information
    UIR LabWindows User Interface Resource
    UIS WindowBlinds Personality Format
    UIT UIX XML Template
    UIX UiXML Page
    UIZ Spybot Search & Destroy Updater
    UK English (British) Language Translation
    UKA Fifa World Cup Game Data
    UKS Microsoft Works
    UKX Unreal Tournament Animation Format
    UKY UltraMixer Licence Key
    ULAW Raw CCITT/ITU G.711 US Telephony Audio Format
    ULB COBOL Unisys Library
    ULD Unified Luminaire Datafile
    ULF Universal List Format
    ULP EAGLE Script
    ULS NetMeeting User Location Service Format
    ULT Ultratracker Music Module (MOD) Format
    ULW U-Law Audio Format
    ULYS Ulysses Project
    ULZ USBlyzer Data Capture Format
    UMB MemMaker Backup
    UMD UMD Mobile Ebook
    UMF MediaHolder Media Format
    UML Visual UML Class Diagram & Model Format
    UMLCLASS Java UML Class Model Format
    UMLX Visual UML XML Model
    UMM Unified Molecular Modeling
    UMOD Unreal Tournament MOD Installation Package Format
    UMP UModel Project
    UMR MyEclipse UML Model Repository
    UMS Rune 3D Mesh Format
    UMX Deus Ex Format
    UNA SIMS Unauthorized Data
    UNAUTH SiteMinder Unauthorized Message Format
    UNCOMPRESSED_SIZE Singularity Game
    UNF Btreive Unformatted
    UNI UniMOD/MikMOD Music Module Format
    UNITXT YS FLIGHT Language
    UNITY Unity Scene Format
    UNITY3D Unity Scene Web Player Format
    UNITYPACKAGE Unity Package Format
    UNITYPROJ Unity 3D Project
    UNIT_VARIANT Total War Unit Variant Settings
    UNIX Unix
    UNK UVProbe Format
    UNKNOWN Unknown File Extension
    UNL Garmin MapSource Unlock Format
    UNQ ACT! 3.0 Email Message Attachment
    UNR Unreal Map Format
    UNS Visual Navigation Suite Export Or Import Settings
    UNT AutoCAD Unit Definition Format
    UNUSED Photoline 4 Defaults
    UNV BusinessObjects Universe
    UNX Unix Text Format
    UOF Uniform Office Format
    UOL PhotoImpact Clipart Image
    UOP Unified Office Format Presentation Format
    UOS Unified Office Format Spreadsheet Format
    UOT Unified Office Format Text Format
    UPC Ultimate Paint Component
    UPD Update Format
    UPDATE ISAPI Update Format
    UPDATR IConomy Update Format
    UPDF UltraPdf Publication
    UPF Nokia Phone Digital Photo Format
    UPG Firmware Upgrade Format
    UPI Ulead PhotoImpact Plugin
    UPJ Ulead Project
    UPK Unreal 3 Game Data Package Format
    UPK0 Metro 2033 Game
    UPL StarMoney Agent Download
    UPM PenMail
    UPO DBASE Compiled Update Data
    UPOI IGO Points Of Interest Format
    UPP Ghostscript Uniprint Unified Printer Parameter
    UPR FileMaker User Spelling Dictionary
    UPS Microsoft Works
    UPX Ultimate Packer For EXecutable Format
    UPZ StarMoney Agent Download
    UQM The Ur-Quan Masters Archive Format
    URC Unicenter Remote Control
    URD Ultra Recall Database
    URD-JOURNAL Ultra Recall Journal Update
    URF AppFace Skin
    URL Internet Shortcut - URL - Uniform Resource Locator
    URLS GetRight Internet Shortcuts List
    URL_ Internet Shortcut - URL - Uniform Resource Locator
    URP Universal Report
    URQ Review QuickChart Chart
    URR Uniface Signatures Format
    URS ControlDraw User Requirement Specifier
    URT Utah Run-Length Encoded Bitmap Image Format
    US English Language Translation
    US? Microsoft Word Font
    USA Microsoft Office Headers Format
    USB SiSoftware Sandra
    USC USC Module Definition
    USECASEDIAGRAM Microsoft Visual Studio Use Case Diagram
    USEQ USeq Genome Data Format
    USER Microsoft Visual Studio Project User Options Format
    USERPROFILE Norton Antivirus User Profile Format
    USERTILE-MS Microsoft Windows 8 Release Preview User Tile Format
    USF Nintendo Ultra 64 Sound Format
    USFLIB Nintendo 64 Song Library Format
    USG PC-Doctor For Windows
    USH Creston SIMPL Windows
    USI UsiXML UI Description
    USL ProWORX Nxt USL Loadable
    USM USM Game Video Format
    USP PageMaker Printer Font
    USR FileMaker Pro Runtime Engine Database Application
    USS WinUAE Saved State
    UST WiFi SiStr Exported User Theme Format
    USTAR Uniform Standard Tape Archive Format
    USX Unreal StaticMesh (hardware Brushes) Format
    UT2 Unreal Tournament Map Format
    UT2MOD Unreal Tournament 2003 MOD Installation Package Format
    UT3 Unreal Tournament 3 Map Format
    UT4MOD Unreal Tournament 2004 MOD Installation Package Format
    UT8 Ghost Master Language Format
    UTB µTBackup Backup
    UTC BioWare Aurora Game Engine Creature Format
    UTD BioWare Aurora Game Engine Door
    UTE BioWare Aurora Game Engine Encounter
    UTF8 Unicode UTF-8 Encoded Text
    UTI Spybot - Search & Destroy Includes
    UTL QuickBooks Data
    UTM BioWare Aurora Game Engine Store
    UTP BioWare Aurora Game Engine Placeable Object
    UTPART µTorrent Unfinished Download
    UTS Spybot - Search & Destroy Include
    UTT BioWare Aurora Engine Trigger
    UTW Unity Whirld Format
    UTX Unreal Texture Format
    UTXT Unicode Text Format
    UTZ UIQ Theme Package
    UU Uuencoded (compressed) File Archive (ascii)
    UUD UUDecoded Format
    UUE UUEncoded Format
    UUS Ultra Utility Skin
    UV2 µVision Project
    UVCAB UVScreenCamera Films
    UVF Uncertain Value Format
    UVNTS UVScreenCamera Notes
    UVPROJ µVision4 Project
    UVR UVR Mesh
    UVS UVScreenCamera Segments
    UVSEG UVScreenCamera Segments
    UVW 3D Studio MAX UVW Coordinates
    UVX Unreal Tournament Saved Game
    UW Unsigned Word (16-bit) Music Format
    UWF UltraTracker WaveSample Music Format
    UWL Corel WordPerfect User Word List Format
    UXDC Microsoft Excel Data Retrieval Service Connection
    UXF UMLet UML EXchange Format
    UXX Unreal Tournament 2003 Cache Format
    UXY Barudan Embroidery Outline
    UYVY YUV 16-bit Image Format
    UZ2 Unreal Tournament Compressed
    UZE UltimateZip Compressed Archive
    UZIP FreeBSD Compressed Disk Image Format
    UZY Backdoor.Sokacaps